Automobile seat coccyx support structure

Abstract

The present invention discloses a tailbone support structure for an automobile seat, comprising: a backrest; a support member disposed at the lower end of the backrest, the support member being capable of correspondingly supporting the tailbone area of an occupant; a linkage mechanism mounted between the support member and the backrest for defining the up-and-down movement of the support member along the thickness direction of the backrest; and a driving mechanism for driving the linkage mechanism to perform an action. The beneficial effect of the present invention is that the driving mechanism drives the support member to protrude forward at the lower end of the backrest, so that the support member can support the tailbone part of the user, which helps to improve the comfort of the seat.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle seats, and particularly to a tailbone support structure for a vehicle seat. Background Art

[0002] The comfort of the seat plays a crucial role in the driving and riding experience of users. Nowadays, both vehicle manufacturers and consumer terminals have put forward more stringent requirements for the comfort of vehicle seats.

[0003] Although significant technological progress has been made in the comfort support of the buttocks and the waist of current vehicle seats, after a user sits on the seat, the area between the waist and the buttocks (hip joint, tailbone) is still in a non-supported state. If this area is in a suspended posture for a long time, it will also cause the user to feel tired from sitting for a long time, and the comfort needs to be improved urgently. In the existing seat structure design, the research on the support structure for parts such as the hip joint and tailbone is almost blank. Summary of the Invention

[0004] In view of this, the present invention provides a tailbone support structure for a vehicle seat, which can support the tailbone part of the user in a lifting manner.

[0005] To achieve the above object, the technical solution of the present invention is as follows:

[0006] A tailbone support structure for a vehicle seat, characterized in that it includes:

[0007] A backrest;

[0008] A support member provided at the lower end of the backrest, and the support member can correspondingly support the tailbone area of the occupant;

[0009] A linkage mechanism installed between the support member and the backrest for restricting the lifting movement of the support member along the thickness direction of the backrest; and

[0010] A driving mechanism for driving the linkage mechanism to perform an action.

[0011] With the above structure, after the driving mechanism is started, under the action of the linkage mechanism, the support member can be driven to move forward, so that the support member supports the tailbone part of the user, that is, the area between the buttocks and the waist, which helps to improve the comfort of the seat.

[0012] Preferably, a support plate is provided at a position corresponding to the rear side of the support member on the backrest. The linkage mechanism includes a first moving block, a first connecting piece, a second connecting piece, a third connecting piece, a fixed block, a fourth connecting piece, a fifth connecting piece, a sixth connecting piece, and a second moving block that are sequentially hinged. Among them, the second connecting piece and the fifth connecting piece are both slidably installed on the rear side of the support member. The fixed block is fixedly installed in the middle of the support plate. The first moving block and the second moving block can slide in opposite directions at both ends of the support plate. With the above structure, the first moving block and the second moving block sliding in opposite directions can drive the support member to perform a lifting motion.

[0013] Preferably, the driving mechanism includes a motor, a gearbox, and a screw rod that are sequentially power-connected. Among them, the screw rod is arranged along the width direction of the backrest. The first moving block and the second moving block are both connected to the screw rod in a threaded socket manner. The thread helix direction of the screw rod corresponding to the position of the first moving block is opposite to the thread helix direction corresponding to the position of the second moving block. With the above structure, the motor drives the screw rod to rotate, and the rotation of the screw rod can make the first moving block and the second moving block move in opposite directions on the screw rod.

[0014] Preferably, one end of the support plate is provided with a flanging extending towards the support member, and the other end is provided with a support platform extending towards the side part of the backrest. A support hole is provided on the flanging. The gearbox is fixedly arranged on the support platform. One end of the screw rod is connected inside the gearbox, and the other end is rotatably installed in the support hole. With the above structure, it is convenient to rotatably install the screw rod.

[0015] Preferably, push plates are provided at positions corresponding to the second connecting piece and the fifth connecting piece on the support member. Bar-shaped holes are provided on the push plates. The second connecting piece is hinged to the first connecting piece and the third connecting piece, and the fifth connecting piece is hinged to the fourth connecting piece and the sixth connecting piece through rivets. The middle parts of the respective rivets are slidably supported in the bar-shaped holes of the corresponding push plates. With the above structure, when the linkage mechanism works, it can ensure that the second connecting piece and the fifth connecting piece slide relative to the support member, ensuring the reliability of the mechanism operation.

[0016] Preferably, the support member has an arc-shaped plate structure, and a positioning convex block is provided on its rear side. A connecting groove is provided on the positioning convex block. The end of the push plate is provided with a plug-in piece adapted to the connecting groove. With the above structure, it is convenient for assembly.

[0017] Preferably, two sets of the linkage mechanisms are symmetrically provided on the rear side of the support member, and the two sets of the linkage mechanisms are distributed along the height direction of the backrest. With the above structure, it can ensure uniform force distribution and improve the reliability of the support.

[0018] Preferably, a rotating shaft extending along the width direction of the backrest is provided at the lower end of the backrest, and the rotating shaft is located between the two linkage mechanisms. With the above installation method, the rotating shaft can be avoided, making the structure of the seat backrest more compact.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] 1. The motor drives the support member to protrude forward at the lower end of the backrest, so that the support member can support the user's coccyx, which helps to improve the comfort of the seat.

[0021] 2. The structure is reasonably arranged, and each mechanism operates reliably. Without changing the existing seat skeleton, modular assembly can be realized, and it has technical advantages such as controllable cost and wide market application prospects.

[0022] 3. The linkage mechanism symmetrically supports the support member in both the width direction and the height direction of the backrest, and the uniformity of the force distribution is good, and the support member has better support comfort for the user. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic structural diagram of an automobile seat;

[0024] Figure 2 is a cross-sectional view of an automobile seat;

[0025] Figure 3 is a schematic partial structural diagram of the seat reflecting the coccyx support structure;

[0026] Figure 4 is an exploded structural diagram reflecting the coccyx support structure;

[0027] Figure 5 is a schematic structural diagram of the support member;

[0028] Figure 6 is a schematic structural diagram of the push plate;

[0029] Figure 7 is a schematic structural diagram of the support plate. DETAILED DESCRIPTION OF THE INVENTION

[0030] The present invention will be further described below in conjunction with the embodiments and the drawings.

[0031] As Figures 1 to 3As shown in the figure, there is an automotive seat. The backrest 1 is rotatably mounted at the rear end of the seat frame 5 with the rotating shaft 12 as the rotation fulcrum. A support member 3 is provided at the lower end of the backrest 1. The support member 3 is in an arc-shaped plate structure and extends along the width direction of the backrest 1. A support plate 11 is fixedly mounted at the position of the backrest 1 corresponding to the rear side of the support member 3. A linkage mechanism 2 is installed between the support member 3 and the support plate 11. The linkage mechanism 2 is used to restrict the lifting movement of the support member 3 along the thickness direction of the backrest 1. A driving mechanism 4 is also installed inside the backrest 1. After the driving mechanism 4 is activated, the linkage mechanism 2 performs an action, thereby driving the support member 3 to move forward, so that the support member 3 supports the user's coccyx area.

[0032] Again, Figure 4 As shown in the figure, the linkage mechanism 2 includes a first moving block 21, a first connecting piece 22, a second connecting piece 23, a third connecting piece 24, a fixed block 25, a fourth connecting piece 26, a fifth connecting piece 27, a sixth connecting piece 28 and a second moving block 29 that are sequentially hinged. Among them, the second connecting piece 23 and the fifth connecting piece 27 are on the same straight line, and both are slidably installed on the rear side of the support member 3. The first moving block 21, the fixed block 25 and the second moving block 29 are also on the same straight line. The fixed block 25 is fixedly assembled in the middle of the support plate 11. The first moving block 21 and the second moving block 29 are located at both ends of the support plate 11, and the first moving block 21 and the second moving block 29 can slide in opposite directions at both ends of the support plate 11. Based on the structural layout of the above-mentioned linkage mechanism 2, when both the first moving block 21 and the second moving block 29 slide towards the direction close to the fixed block 25, the linkage mechanism 2 will drive the support member 3 to move forward relative to the backrest 1, so as to support the user's coccyx area. When both the first moving block 21 and the second moving block 29 slide away from the fixed block 25, the linkage mechanism 2 will drive the support member 3 to retract, thereby completing the folding of the mechanism.

[0033] In order to be able to drive the first moving block 21 and the second moving block 29 to slide in opposite directions simultaneously, in this embodiment, the driving mechanism 4 includes a motor 41, a flexible shaft 44, a gearbox 42 and a screw 43 that are sequentially power-connected. Among them, the screw 43 is arranged along the width direction of the backrest 1. Both the first moving block 21 and the second moving block 29 are connected to the screw 43 in a threaded socket manner. The thread helix direction of the screw 43 corresponding to the position of the first moving block 21 is opposite to the thread helix direction corresponding to the position of the second moving block 29. The motor 41 drives the screw 43 to rotate, and the rotation of the screw 43 can drive the first moving block 21 and the second moving block 29 to move in opposite directions on the screw 43.

[0034] Furthermore, as Figure 4 and 7As shown in the figure, in order to facilitate the assembly of the components of the driving mechanism 4, one end of the support plate 11 is provided with a flange 111 extending towards the support component 3, and the other end is provided with a support platform 112 extending towards the side of the backrest 1. A support hole 113 is provided on the flange 111. The motor 41 is fixed to the side of the backrest 1, and the gearbox 42 is fixedly arranged on the support platform 112. One end of the screw 43 is connected to the inside of the gearbox 42, and the other end is rotatably installed in the support hole 113. The power transmission relationship of the driving mechanism 4 is: motor 41 → flexible shaft 44 → gearbox 42 → screw 43.

[0035] Again, Figure 5 and 6 As shown in the figure, in order to achieve the sliding connection between the second connecting piece 23 and the fifth connecting piece 27 and the support component 3, the support component 3 is provided with a push plate 31 at the positions corresponding to the second connecting piece 23 and the fifth connecting piece 27. A strip-shaped hole 32 is provided on the push plate 31. The second connecting piece 23 is hinged to the first connecting piece 22, the second connecting piece 23 is hinged to the third connecting piece 24, the fifth connecting piece 27 is hinged to the fourth connecting piece 26, and the fifth connecting piece 27 is hinged to the sixth connecting piece 28 through rivets 20. The middle parts of the rivets 20 are slidably supported in the strip-shaped holes 32 of the corresponding push plates 31. When the linkage mechanism 2 performs an action, the rivets 20 slide along the strip-shaped holes 32, that is, the second connecting piece 23 and the fifth connecting piece 27 slide along the corresponding strip-shaped holes 32.

[0036] Furthermore, in order to facilitate the assembly of the support component 3 and the push plate 31, a positioning convex block 33 is provided at the rear side of the support component 3, a connecting groove 34 is provided on the positioning convex block 33, and an insertion piece 35 adapted to the connecting groove 34 is provided at the end of the push plate 31.

[0037] In this embodiment, the number of linkage mechanisms 2 is two groups, and the two groups of linkage mechanisms 2 are symmetrically distributed along the height direction of the backrest 1 at the rear side of the support component 3. With such a design, the force distribution can be ensured to be uniform, and the reliability of the support can be improved. The first connecting pieces 22, the third connecting pieces 24, the fourth connecting pieces 26, and the sixth connecting pieces 28 of the two groups of linkage mechanisms 2 share a set of first moving blocks 21, fixed blocks 25, and second moving blocks 29. The first connecting pieces 22, the third connecting pieces 24, the fourth connecting pieces 26, and the sixth connecting pieces 28 of the two groups of linkage mechanisms 2 are symmetrically connected to both sides of the corresponding first moving blocks 21, fixed blocks 25, and second moving blocks 29.

[0038] Again, Figure 2 As shown in the figure, in order to avoid the rotating shaft 12 and make the structure of the seat backrest 1 more compact, the rotating shaft 12 at the lower end of the backrest 1 passes through between the two groups of linkage mechanisms 2.

[0039] In addition to adopting the implementation method provided in this embodiment, the linkage mechanism 2 can also directly adopt a fork-type lifting mechanism.

[0040] Finally, it should be noted that the above description is only the preferred embodiment of the present invention. Under the inspiration of the present invention, those of ordinary skill in the art can make various similar representations without violating the purpose and claims of the present invention. Such transformations all fall within the protection scope of the present invention.

Claims

1. An automobile seat coccyx support structure, characterized in that, Comprising: A backrest (1); A support member (3) provided at the lower end of the backrest (1), and the support member (3) can correspondingly support the coccyx region of the occupant; A linkage mechanism (2) installed between the support member (3) and the backrest (1) for restricting the up and down movement of the support member (3) in the thickness direction of the backrest (1); a support plate (11) is provided at the position corresponding to the rear side of the support member (3) on the backrest (1), and the linkage mechanism (2) includes a first moving block (21), a first connecting piece (22), a second connecting piece (23), a third connecting piece (24), a fixed block (25), a fourth connecting piece (26), a fifth connecting piece (27), a sixth connecting piece (28) and a second moving block (29) that are sequentially hinged. Among them, the second connecting piece (23) and the fifth connecting piece (27) are both slidably installed on the rear side of the support member (3), the fixed block (25) is fixedly installed in the middle of the support plate (11), and the first moving block (21) and the second moving block (29) can slide in opposite directions at both ends of the support plate (11); Two sets of the linkage mechanisms (2) are symmetrically provided on the rear side of the support member (3), and the two sets of the linkage mechanisms (2) are symmetrically distributed along the height direction of the backrest (1) on the rear side of the support member (3), and the two sets of the linkage mechanisms (2) share a set of the first moving block (21), the fixed block (25) and the second moving block (29). The first connecting piece (22), the second connecting piece (23), the third connecting piece (24), the fourth connecting piece (26), the fifth connecting piece (27) and the sixth connecting piece (28) of the two sets of the linkage mechanisms (2) are symmetrically connected to both sides of the corresponding first moving block (21), fixed block (25) and second moving block (29); and A driving mechanism (4) for driving the linkage mechanism (2) to perform actions.

2. The automotive seat coccyx support structure according to claim 1, characterized in that: The driving mechanism (4) includes a motor (41), a gearbox (42) and a screw (43) that are sequentially power-connected. Among them, the screw (43) is arranged along the width direction of the backrest (1), and the first moving block (21) and the second moving block (29) are both connected to the screw (43) in a threaded socket manner, and the thread rotation direction of the screw (43) at the position corresponding to the first moving block (21) is opposite to the thread rotation direction at the position corresponding to the second moving block (29).

3. The automotive seat coccyx support structure according to claim 2, characterized in that: One end of the support plate (11) is provided with a flange (111) extending towards the support member (3), and the other end is provided with a support platform (112) extending towards the side part of the backrest (1). A support hole (113) is provided on the flange (111), the gearbox (42) is fixedly arranged on the support platform (112), one end of the screw (43) is connected in the gearbox (42), and the other end is rotatably installed in the support hole (113).

4. The automotive seat coccyx support structure according to claim 1, characterized in that: The support member (3) is provided with push plates (31) at positions corresponding to the second connecting piece (23) and the fifth connecting piece (27). A strip-shaped hole (32) is provided on the push plate (31). Between the second connecting piece (23) and the first connecting piece (22) and the third connecting piece (24), and between the fifth connecting piece (27) and the fourth connecting piece (26) and the sixth connecting piece (28), they are all hinged by rivets (20). The middle parts of the respective rivets (20) are slidably supported in the strip-shaped holes (32) of the corresponding push plates (31).

5. The automotive seat coccyx support structure according to claim 4, characterized in that: The support member (3) has an arc-shaped plate structure. A positioning convex block (33) is provided on its rear side. A connecting groove (34) is provided on the positioning convex block (33). The end of the push plate (31) is provided with a plug-in piece (35) adapted to the connecting groove (34).

6. The automotive seat coccyx support structure according to claim 1, wherein: The lower end of the backrest (1) is provided with a rotating shaft (12) extending along its width direction. The rotating shaft (12) is located between the two sets of linkage mechanisms (2).

7. The tailbone support structure of the vehicle seat according to claim 3, characterized in that: The motor (41) is fixed on the side of the backrest (1). The motor (41) is power-connected to the gearbox (42) through a flexible shaft (44).

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